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What are the advantages of using redis? In view of this problem, this article introduces the corresponding analysis and answers in detail, hoping to help more partners who want to solve this problem to find a more simple and feasible way.

Redis is a non-relational in-memory database data stored in memory, memory reading speed is very fast, if it is only a simple key-value, memory is not the bottleneck. In general, hash lookups can reach the order of magnitude of millions per second.

Single thread is adopted to avoid unnecessary context switching and competition conditions.

The internal implementation adopts epoll and adopts a simple event framework implemented by epoll+ itself. Read, write, close, and connect in epoll are all converted into events, and then make use of the multiplexing feature of epoll to never waste any time on io.

Because Redis operates very fast-all its data is in memory and there is no need to access disk at all. As for concurrency, Redis uses multi-channel Istroke O multiplexing technology, so its concurrency efficiency is not a problem.

Of course, a single Redis process cannot use multiple cores (it can only run on one CPU core at any one time), but it is not a very compute-intensive service in the first place. If the performance of a single core is not enough, you can open a few more processes.

Redis adopts a single-threaded model, which ensures the atomicity of each operation and reduces the context switching and competition of threads.

In addition, the data structure also helps a lot. Redis uses hash structure throughout the process to read fast, and there are some special data structures that optimize the data storage, such as compressing tables, compressing and storing short data, and skipping tables, using ordered data structures to speed up reading.

In addition, Redis uses its own event separator, which is relatively efficient, uses non-blocking execution mode internally, and has relatively large throughput capacity.

String type, binary safe

Hash type, which is a collection of key-value pairs

At the bottom of the List list is a linked list

Set collections do not need to be implemented through hashtale

Zset sort set ordered set

This is the answer to the question about the advantages of using redis. I hope the above content can be of some help to you. If you still have a lot of doubts to be solved, you can follow the industry information channel to learn more about it.

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